Carroll Alsop House, also known as Mitchell House, is a historic residence located in Oskaloosa, Iowa, United States. It is one of seven Frank Lloyd Wright designed Usonian houses located in Iowa, and one of two that were constructed in Oskaloosa. Both were completed in 1951. This house is an L-plan, unless you count the carport, which makes it a T-plan. It was a custom-built house that embodied the ideals of "free and simple living, in touch with nature, for the family of moderate means." The house was listed on the National Register of Historic Places in 1988.